Referencing a .NET 4.5.2 class library in .Net Standard 1.6 project

Question

This scenario might be weird. But i want to reference an existing .NET 4.5.2 class library into a new .Net Standard 1.6 class library using Nuget. I cannot see the .Net 4.5.2 class library in Nuget package store at all.

I don't want to migrate any existing projects to .Net Core but want to use them in .Net core projects.

Is it possible to achieve this? Or am i trying to achieve something which is not the purpose of .Net Core.

My project.json is as below.

{ "version": "1.0.0-*", "dependencies": { "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0", "NETStandard.Library": "1.6.0", "AutoMapper": "5.0.2", "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0", "Microsoft.VisualStudio.clrdbg": "14.0.25520-preview-3139256" }, "tools" : { "Microsoft.EntityFrameworkCore.Tools": { "version": "1.0.0-preview2-final", "imports": [ "portable-net45+win8+dnxcore50", "portable-net45+win8" ] } }, "frameworks": { "netstandard1.6": { "imports": [ "dnxcore50", "net452" ] } } }

UPDATE :

I added net452 section under frameworks. Then i am getting Cannot Resolve errors for few packages already installed. PFA screenshot.

Is there anyway i can force this to to work .

user3163840 · Accepted Answer · 2016-08-31 10:27:25Z

You're missing the Net45 import in your framework imports section. If it's a runnable project, then you will need to add the Microsoft.NETCore.App to your dependencies and import the necessary frameworks in order for it to work

{ "version": "1.0.0-*", "dependencies": { "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0", "Microsoft.NETCore.App": { "type": "platform", "version": "1.0.0" }, "AutoMapper": "5.0.2", "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0", "Microsoft.VisualStudio.clrdbg": "14.0.25520-preview-3139256" }, "tools" : { "Microsoft.EntityFrameworkCore.Tools": { "version": "1.0.0-preview2-final", "imports": [ "portable-net45+win8+dnxcore50", "portable-net45+win8" ] } }, "frameworks": { "netcoreapp1.1": { "imports": [ "portable-net45+wp80+win8+wpa81+dnxcore50", "dnxcore50", "net452" ] } }, "buildOptions": { "emitEntryPoint": true, "preserveCompilationContext": true }, }

However, if you're using a PCL you'll then need to use the netstandard framework and import the necessary frameworks in order for the PCL to build.

{ "version": "1.0.0-*", "dependencies": { "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0", "NETStandard.Library": "1.6.0", "AutoMapper": "5.0.2", "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0", "Microsoft.VisualStudio.clrdbg": "14.0.25520-preview-3139256" }, "tools" : { "Microsoft.EntityFrameworkCore.Tools": { "version": "1.0.0-preview2-final", "imports": [ "portable-net45+win8+dnxcore50", "portable-net45+win8" ] } }, "frameworks": { "netstandard1.6": { "imports": [ "portable-net45+wp80+win8+wpa81+dnxcore50", "dnxcore50", "net452" ] } } }

Have tested my updated project.json in a pcl. It's working fine

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